• 从yum提示空间不足到根分区扩容


    记录一次安装软件的报错

                                                                      ——1261065212@qq.com        

    1.系统版本(VMware 虚拟机)

    [root@ansible-admin ~]# cat /etc/redhat-release

    CentOS Linux release 7.3.1611 (Core)

    2.当执行yum安装软件时报如下错

    Error: Error writing to file /var/cache/yum/x86_64/7/epel/gen/filelists_db.sqlite: [Errno 28] No space left on device

    是由于磁盘空间不够,清除了部分无用日志之后再次安装

    #yum install gitlab-ce -y

    ………………………………

    Transaction Summary

    =====================================================================================================================

    Install  1 Package

    Total download size: 378 M

    Installed size: 378 M

    Is this ok [y/d/N]: y

    Downloading packages:

    Error downloading packages:

      gitlab-ce-9.5.2-ce.0.el7.x86_64: Insufficient space in download directory /var/cache/yum/x86_64/7/gitlab-ce/packages

        * free   312 M

        * needed 378 M

     

    3.提示空间不足,剩余空间只有312M,查看磁盘使用空间发现根分区确实只剩313M了

    [root@ansible-admin ~]# df -h

    Filesystem           Size  Used Avail Use% Mounted on

    /dev/mapper/cl-root  6.2G  5.9G  313M  96% /  #扩容的对象

    devtmpfs             482M     0  482M   0% /dev

    tmpfs                493M     0  493M   0% /dev/shm

    tmpfs                493M   50M  443M  11% /run

    tmpfs                493M     0  493M   0% /sys/fs/cgroup

    /dev/sda1           1014M  139M  876M  14% /boot

    tmpfs                 99M     0   99M   0% /run/user/0

    /dev/sr0             680M  680M     0 100% /mnt

    [root@ansible-admin boot]# df -h /var /var目录确实为312M

    Filesystem           Size  Used Avail Use% Mounted on

    /dev/mapper/cl-root  6.2G  5.9G  312M  96% /

    4.于是开始扩容根分区

     1)添加磁盘

       虚拟机——设置——添加——硬盘——下一步——选择磁盘类型——下一步——填写磁盘大小——完成

     2)查看磁盘

    [root@ansible-admin boot]# fdisk -l

    Disk /dev/sda: 8589 MB, 8589934592 bytes, 16777216 sectors

    Units = sectors of 1 * 512 = 512 bytes

    Sector size (logical/physical): 512 bytes / 512 bytes

    I/O size (minimum/optimal): 512 bytes / 512 bytes

    Disk label type: dos

    Disk identifier: 0x000b9a5e

     

       Device Boot      Start         End      Blocks   Id  System

    /dev/sda1   *        2048     2099199     1048576   83  Linux

    /dev/sda2         2099200    16777215     7339008   8e  Linux LVM

     

    Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors #添加的新磁盘

    Units = sectors of 1 * 512 = 512 bytes

    Sector size (logical/physical): 512 bytes / 512 bytes

    I/O size (minimum/optimal): 512 bytes / 512 bytes

    Disk label type: dos

    Disk identifier: 0x4fddc909

     

       Device Boot      Start         End      Blocks   Id  System

     

    Disk /dev/mapper/cl-root: 6652 MB, 6652166144 bytes, 12992512 sectors

    Units = sectors of 1 * 512 = 512 bytes

    Sector size (logical/physical): 512 bytes / 512 bytes

    I/O size (minimum/optimal): 512 bytes / 512 bytes

     

    Disk /dev/mapper/cl-swap: 859 MB, 859832320 bytes, 1679360 sectors

    Units = sectors of 1 * 512 = 512 bytes

    Sector size (logical/physical): 512 bytes / 512 bytes

    I/O size (minimum/optimal): 512 bytes / 512 bytes

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

      

     

    (3)为新磁盘创建分区

    创建分区:

    [root@ansible-admin boot]# fdisk /dev/sdb

    Welcome to fdisk (util-linux 2.23.2).

     

    Changes will remain in memory only, until you decide to write them.

    Be careful before using the write command.

     

    Command (m for help): n        #新建分区

    Partition type:

       p   primary (0 primary, 0 extended, 4 free)

       e   extended

    Select (default p): p           #选择分区类型

    Partition number (1-4, default 1):  #默认为1(因为是新磁盘第一次创建分区)

    First sector (2048-41943039, default 2048):

    Using default value 2048

    Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039): #这里我只创建一个分区所以默认是使用所有空间

    Using default value 41943039

    Partition 1 of type Linux and of size 20 GiB is set

     

    Command (m for help): w  #保存分区结果

    The partition table has been altered!

    Calling ioctl() to re-read partition table.

    Syncing disks.

    让系统重新读取分区表:

    [root@ansible-admin boot]# partprobe

    Warning: Unable to open /dev/sr0 read-write (Read-only file system).  /dev/sr0 has been opened read-only.

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

    (4)扩容

    由于sda已经为LVM所以可以直接为其扩容,无需再创建新的LVM

    创建物理卷(PV):

    使用pvcreate命令创建物理卷,pvdisplay查看物理卷信息

    创建物理卷:

    [root@ansible-admin boot]# pvcreate /dev/sdb1

      Physical volume "/dev/sdb1" successfully created.

    查看物理卷信息:

    [root@ansible-admin boot]# pvdisplay

      --- Physical volume ---

      PV Name               /dev/sda2

      VG Name               cl   #原有盘上的PV

      PV Size               7.00 GiB / not usable 3.00 MiB

      Allocatable           yes (but full)

      PE Size               4.00 MiB

      Total PE              1791

      Free PE               0

      Allocated PE          1791

      PV UUID               beyPTU-i2Ny-ltMw-0tfr-Me0b-Sz0Z-ybS4cy

       

      "/dev/sdb1" is a new physical volume of "20.00 GiB"

      --- NEW Physical volume ---

      PV Name               /dev/sdb1

      VG Name        #新建的PVVG name是空的,下一步就是把PV加入VG       

      PV Size               20.00 GiB

      Allocatable           NO

      PE Size               0   

      Total PE              0

      Free PE               0

      Allocated PE          0

      PV UUID               5N1q14-vf7Y-U1dm-1tkf-ZxAQ-16lE-pW2M5F

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

    查看原VG的情况

    [root@ansible-admin boot]# vgdisplay

      --- Volume group ---

      VG Name               cl  #注意记录此名字,扩容时将新的pv加入指定的名字

      System ID             

      Format                lvm2

      Metadata Areas        1

      Metadata Sequence No  3

      VG Access             read/write

      VG Status             resizable

      MAX LV                0

      Cur LV                2

      Open LV               2

      Max PV                0

      Cur PV                1

      Act PV                1

      VG Size               7.00 GiB

      PE Size               4.00 MiB

      Total PE              1791

      Alloc PE / Size       1791 / 7.00 GiB

      Free  PE / Size       0 / 0   #发现空闲空间为0(以G计算)

      VG UUID               l4mGeJ-090j-NZ1U-UOhI-c56R-0mtM-xiBm9h

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

    扩展卷组,/dev/sdb物理卷添加到cl卷组中

     

    再查看VG情况,可以看到VG大小变化,空余空间

     

    将新的VG空间划入LV(扩容lv_root

    直接扩展10G/root分区,不用umount,也不需要重启扩张多大可根据添加的磁盘大小自由支配

    [root@ansible-admin boot]# lvextend -L +10G  /dev/mapper/cl-root

      Size of logical volume cl/root changed from 6.20 GiB (1586 extents) to 16.20 GiB (4146 extents).

      Logical volume cl/root successfully resized.

     

     

     

     

     

    也可以使用命令

    # lvextend -l +50%FREE /dev/mapper/cl-root表示将剩余空间的50%划入LV

    使用xfs_growfs命令在线调整xfs格式文件系统大小(CentOS6使用resize2fs

    #xfs_growfs /dev/cl/root (因为CentOS7默认文件系统类型为xfs

     

    最后我们看到逻辑卷分区已经动态扩容到了11G

     

    至此一次CentOS7 根分区扩容顺利完成

    若为非商业用途,转发请注明出处。

  • 相关阅读:
    适配器模式(Adapter)
    状态模式(State)
    观察者模式(Publish/Subscribe)
    建造者模式(Builder)
    数据库,知识点汇总
    数据库
    css样式大全
    遮罩层
    js数组冒泡
    js基本方法
  • 原文地址:https://www.cnblogs.com/lwf-blog/p/7464477.html
Copyright © 2020-2023  润新知